WO2022247418A1 - 图像校正方法及拍摄设备 - Google Patents

图像校正方法及拍摄设备 Download PDF

Info

Publication number
WO2022247418A1
WO2022247418A1 PCT/CN2022/082298 CN2022082298W WO2022247418A1 WO 2022247418 A1 WO2022247418 A1 WO 2022247418A1 CN 2022082298 W CN2022082298 W CN 2022082298W WO 2022247418 A1 WO2022247418 A1 WO 2022247418A1
Authority
WO
WIPO (PCT)
Prior art keywords
image
projection
frame
projection screen
prompt
Prior art date
Application number
PCT/CN2022/082298
Other languages
English (en)
French (fr)
Inventor
陈许
张冬冬
Original Assignee
青岛海信激光显示股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 青岛海信激光显示股份有限公司 filed Critical 青岛海信激光显示股份有限公司
Priority to CN202280037929.4A priority Critical patent/CN117378196A/zh
Publication of WO2022247418A1 publication Critical patent/WO2022247418A1/zh
Priority to US18/467,613 priority patent/US20240007741A1/en

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/60—Control of cameras or camera modules
    • H04N23/63—Control of cameras or camera modules by using electronic viewfinders
    • H04N23/631—Graphical user interfaces [GUI] specially adapted for controlling image capture or setting capture parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/60—Control of cameras or camera modules
    • H04N23/64—Computer-aided capture of images, e.g. transfer from script file into camera, check of taken image quality, advice or proposal for image composition or decision on when to take image
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3141—Constructional details thereof
    • H04N9/315—Modulator illumination systems
    • H04N9/3161—Modulator illumination systems using laser light sources
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N17/00—Diagnosis, testing or measuring for television systems or their details
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/60—Control of cameras or camera modules
    • H04N23/63—Control of cameras or camera modules by using electronic viewfinders
    • H04N23/631—Graphical user interfaces [GUI] specially adapted for controlling image capture or setting capture parameters
    • H04N23/632—Graphical user interfaces [GUI] specially adapted for controlling image capture or setting capture parameters for displaying or modifying preview images prior to image capturing, e.g. variety of image resolutions or capturing parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/60—Control of cameras or camera modules
    • H04N23/63—Control of cameras or camera modules by using electronic viewfinders
    • H04N23/633—Control of cameras or camera modules by using electronic viewfinders for displaying additional information relating to control or operation of the camera
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/60—Control of cameras or camera modules
    • H04N23/63—Control of cameras or camera modules by using electronic viewfinders
    • H04N23/633—Control of cameras or camera modules by using electronic viewfinders for displaying additional information relating to control or operation of the camera
    • H04N23/634—Warning indications
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/60—Control of cameras or camera modules
    • H04N23/63—Control of cameras or camera modules by using electronic viewfinders
    • H04N23/633—Control of cameras or camera modules by using electronic viewfinders for displaying additional information relating to control or operation of the camera
    • H04N23/635—Region indicators; Field of view indicators
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3179—Video signal processing therefor
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3179—Video signal processing therefor
    • H04N9/3185—Geometric adjustment, e.g. keystone or convergence
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3191—Testing thereof
    • H04N9/3194—Testing thereof including sensor feedback

Definitions

  • the present disclosure relates to the field of projection display, in particular to an image correction method and a shooting device.
  • Ultra-short-throw laser projection equipment can project and display projected images on a projection screen.
  • the light is emitted obliquely upwards, so the position between the laser beam emitted by the optical engine in the ultra-short-focus laser projection equipment and the projection screen must be strictly aligned.
  • a slight shift of the focal laser projection equipment can also cause distortion or distortion of the picture. If the user accidentally moves the ultra-short-focus laser projection device, the projected image projected and displayed by the ultra-short-focus laser projection device may exceed the projection screen, resulting in a poor display effect of the displayed projected image.
  • an image correction method is provided, which is applied to a shooting device, the shooting device includes a camera, and the method includes:
  • the preview image includes a projection screen, and a projection image is displayed on the projection screen;
  • the adjustment prompt information is used to prompt adjustment of shooting parameters of the camera;
  • the captured image is sent to a laser projection device, and the captured image is used for the laser projection device to correct a projection image to be displayed based on the captured image.
  • a photographing device in another aspect of the present application, includes a camera, and the photographing device is used for:
  • the preview image includes a projection screen, and a projection image is displayed on the projection screen;
  • the adjustment prompt information is used to prompt adjustment of shooting parameters of the camera;
  • the captured image is sent to a laser projection device, and the captured image is used for the laser projection device to correct a projection image to be displayed based on the captured image.
  • FIG. 1 is an implementation environment involved in an image correction method provided by an embodiment of the present disclosure
  • FIG. 2 is a flowchart of an image correction method provided by an embodiment of the present disclosure
  • Fig. 3 is a flowchart of another image correction method provided by an embodiment of the present disclosure.
  • FIG. 4 is a schematic diagram of a projected image provided by an embodiment of the present disclosure.
  • FIG. 5 is a schematic diagram of another projected image provided by an embodiment of the present disclosure.
  • Fig. 6 is a schematic diagram of a first prompt box and a second prompt box provided by an embodiment of the present disclosure
  • Fig. 7 is a schematic diagram of another first prompt box and a second prompt box provided by an embodiment of the present disclosure.
  • Fig. 8 is a schematic diagram of a shooting prompt box provided by an embodiment of the present disclosure.
  • FIG. 9 is a schematic diagram of another shooting prompt box provided by an embodiment of the present disclosure.
  • FIG. 10 is a schematic structural diagram of a shooting device provided by an embodiment of the present disclosure.
  • FIG. 11 is a schematic structural diagram of another laser projection device provided by an embodiment of the present disclosure.
  • FIG. 12 is a schematic structural diagram of another laser projection device provided by an embodiment of the present disclosure.
  • FIG. 13 is a schematic structural diagram of another laser projection device provided by an embodiment of the present disclosure.
  • FIG. 14 is a schematic structural diagram of another laser projection device provided by an embodiment of the present disclosure.
  • FIG. 15 is a schematic structural diagram of another laser projection device provided by an embodiment of the present disclosure.
  • FIG. 16 is a schematic structural diagram of another laser projection device provided by an embodiment of the present disclosure.
  • FIG. 1 is an implementation environment involved in an image correction method provided by an embodiment of the present disclosure. As shown in FIG. 1 , the implementation environment may include: a shooting device 10 and a laser projection device 20 .
  • the photographing device 10 may be a device provided with a camera, for example, the photographing device 10 may be a device provided with a camera such as a mobile phone, a personal computer, a notebook computer or a tablet computer.
  • the laser projection device 20 may be an ultra-short-focus laser projection device.
  • the photographing device 10 and the laser projection device 20 can be connected through a wired network or a wireless network.
  • Fig. 2 is a flowchart of an image correction method provided by an embodiment of the present disclosure. This method can be applied to the photographing device 10 shown in FIG. 1 . As shown in Figure 2, the method may include:
  • Step 201 displaying a preview image captured by a camera.
  • the photographing device may capture the projection screen through a camera, and may display a preview image captured by the camera.
  • the preview screen may include the frame of the projection screen and the projection image.
  • the projected image may include a plurality of characteristic figures arranged in an array, and the characteristic figures may be a cross or a quadrangle.
  • a shooting application may be installed in the shooting device, and after starting the shooting application, the shooting device may display a preview image captured by the camera in the shooting interface of the shooting application.
  • Step 202 if it is detected that the frame of the projection screen in the preview image is outside the target area of the preview image, then display an adjustment prompt message.
  • the shooting device After the shooting device displays the preview picture captured by the camera, it can detect the position of the frame of the projection screen in the preview picture. If the position of the border of the projection screen is outside the target area of the preview image, the photographing device can determine that the photographed image captured by the camera does not meet the requirements at this time, and thus can display an adjustment prompt message.
  • the adjustment prompt information is used to prompt adjustment of shooting parameters of the camera.
  • the shooting parameter may include: the distance between the camera and the projection screen, and/or, the focal length of the camera.
  • Step 203 in response to the shooting operation, acquire the captured image captured by the camera.
  • the photographing device can also acquire photographed images captured by the camera in response to the photographing operation.
  • the shooting interface of the shooting device further displays a shooting button, and the shooting operation may be a click operation on the shooting button.
  • Step 204 sending the captured image to the laser projection device.
  • the photographing device After the photographing device acquires the photographed image, it can send the photographed image to the laser projection device, and the laser projection device can correct the projection image to be displayed based on the photographed image.
  • the embodiments of the present disclosure provide an image correction method, which can send the captured image to the laser projection device after acquiring the captured image captured by the camera on the projection screen.
  • the laser projection device corrects the projected image to be displayed based on the captured image, thereby preventing the projected image to be displayed from exceeding the projection screen, thereby ensuring the display effect of the projected image.
  • the photographing device detects that the frame of the projection screen in the preview image is outside the target area of the preview image, it can determine that the captured image captured by the camera does not meet the requirements at this time, and thus displays an adjustment prompt message.
  • the user can adjust the shooting parameters of the camera in time to ensure that the size of the projection screen in the captured image captured by the camera meets the requirements, thereby ensuring the reliability of the captured captured image, and further improving the correction of the projected image to be displayed based on the captured image. reliability.
  • Fig. 3 is a flowchart of another image correction method provided by an embodiment of the present disclosure. This method can be applied to the photographing device 10 shown in FIG. 1 . As shown in Figure 3, the method may include:
  • Step 301 displaying a preview image captured by a camera.
  • the photographing device may capture the projection screen through a camera, and may display a preview image captured by the camera.
  • the preview screen may include the frame of the projection screen and the projection image.
  • the projected image may include a plurality of characteristic figures arranged in an array, and each characteristic figure may be a quadrangle or a cross.
  • the colors of the plurality of characteristic figures may all be the same, and the color of each characteristic figure is different from the background color of the projected image.
  • the projected image 00 may include 4 ⁇ 4 16 characteristic figures 001 in total, each of the characteristic figures 001 may be in the shape of a cross, the color of each of the characteristic figures 001 may be black, and the background color of the projected image 00 Can be white.
  • the projected image may be a checkerboard image, and the projected image may include a plurality of black characteristic patterns and a plurality of white characteristic patterns arranged in an array, and each black characteristic pattern is adjacent to a white characteristic pattern.
  • the projected image 00 may include a total of 576 characteristic patterns 001 of 18 ⁇ 32, and the 576 characteristic patterns 001 include a plurality of black characteristic patterns and a plurality of white characteristic patterns, and each black characteristic pattern corresponds to a white characteristic pattern adjacent.
  • a shooting application may be installed in the shooting device, and after starting the shooting application, the shooting device may display a preview image captured by the camera in the shooting interface of the shooting application.
  • Step 302 detecting whether there is a border of the projection screen and a projection image in the preview image.
  • the shooting device After displaying the preview picture captured by the camera, the shooting device can detect whether there is a frame of the projection screen and a projected image in the preview picture. If the frame of the projection screen and the projection image exist in the preview image, step 303 may be executed. If the frame of the projection screen and the projected image do not exist in the preview image, the process can be ended.
  • the projection screen may include a projection area and a frame surrounding the projection area.
  • the feature graphics in the projected image are located within the frame.
  • the frame may be a closed polygon, such as a rectangle.
  • the color of the frame may be different from the color of the projection area.
  • the shooting device may use a target detection algorithm to detect whether there are borders of the projection screen and projection images in the preview image.
  • the frame template of the projection screen and the template of the feature graph may be pre-stored in the photographing device, and the target detection algorithm may be a detection algorithm based on template matching. It can be understood that the determining by the shooting device that there is a frame of the projection screen in the preview image means that a complete frame is recognized in the preview image.
  • Step 303 detecting whether the frame of the projection screen in the preview image is outside the target area of the preview image.
  • the shooting device After the shooting device recognizes the frame of the projection screen and the projected image in the preview image, it can determine the position of the frame of the projection screen in the preview image. If the position of the border of the projection screen is outside the target area of the preview image, the photographing device may determine that the photographed image captured by the camera does not meet the requirements at this time, and thus step 304 may be performed. If the position of the frame of the projection screen is within the target area of the preview image, the photographing device can determine that the photographed image captured by the camera at this time meets the requirements, and thus step 305 can be executed.
  • the frame of the projection screen is located within the target area means that each side of the frame is located within the target area.
  • the target area can be a fixed area in the preview image, and when the frame of the projection screen is located in the target area, the size of the projection screen in the preview image is more appropriate, which is convenient for the laser projection device to identify the position of the feature graphic in the projection graphic, and then based on The position of the characteristic figure is corrected for the projection position of the projected image to be displayed.
  • the target area may be an annular area, such as a rectangular annular area.
  • a ratio range is pre-stored in the shooting device.
  • the upper limit of the ratio range may be the ratio of the outer ring area of the target area to the area of the preview image, and the lower limit of the ratio range may be the ratio of the inner ring area of the target area to the area of the preview image. ratio.
  • the shooting device After the shooting device recognizes the frame of the projection screen and the projected image in the preview image, it can calculate the ratio of the area of the projection screen in the preview image to the area of the preview image. If the ratio is outside the ratio range, the shooting device may determine that the frame of the projection screen is outside the target area of the preview image. If the ratio is within the ratio range, the photographing device can determine that the frame of the projection screen is within the target area of the preview image.
  • the area of the projection screen refers to the area of the area enclosed by all the sides of the frame of the projection screen.
  • Step 304 can be executed.
  • Step 304 displaying adjustment prompt information.
  • the shooting device may display adjustment prompt information.
  • the adjustment prompt information is used to prompt adjustment of shooting parameters of the camera.
  • the shooting parameter may include the distance between the camera and the projection screen, and/or, the focal length of the camera.
  • the adjustment prompt information is also used to prompt that the frame of the projection screen is outside the target area of the preview image.
  • the adjustment prompt information is also used to prompt that the ratio is not within the ratio range. For example, if the ratio is 50% and the lower limit of the ratio range is 60%, the adjustment prompt information may be that the proportion of the current projection screen in the preview image is less than 60%.
  • the shooting device may also display a shooting prompt box at a target position in the preview image, and the adjustment prompt information is also used to prompt to move the frame of the projection screen to the target area defined by the shooting prompt box.
  • the target position may be the position of the center point of the preview image, and the center point of the shooting prompt box may coincide with the center point of the preview image.
  • the target area may be an area in the preview image other than the area enclosed by the shooting prompt frame.
  • the shooting prompt frame may include a first prompt frame and a second prompt frame surrounding the first prompt frame, the target area may be an area between the first prompt frame and the second prompt frame, and the adjustment prompt information is also used for Prompt to move the border of the projection screen to between the first prompt box and the second prompt box.
  • the first prompt box and the second prompt box may be polygons.
  • both the first prompt box and the second prompt box may be quadrilaterals.
  • both the first prompt box and the second prompt box may be unclosed graphics, and the unclosed graphics include a plurality of spaced boundary lines.
  • the first prompt frame 010 displayed in the preview screen 01 and the second prompt frame 011 surrounding the first prompt frame 010 can both be a rectangular dotted frame
  • the adjustment prompt information 012 can be:
  • the current projection screen accounts for less than 60% of the preview image. Please move the camera close to the projection screen to move the frame of the projection screen between the first prompt box 010 and the second prompt box 011 .
  • both the first prompt box 010 displayed in the preview screen 01 and the second prompt box 011 surrounding the first prompt box 010 may include four spaced boundary lines, and the four spaced boundary lines may surround into a rectangle, and the four spaced boundary lines are located at the four corners of the rectangle.
  • the adjustment prompt information 012 can be: the proportion of the current projection screen in the preview image is less than 60%, please move the camera close to the projection screen to move the border of the projection screen to between the first prompt box 010 and the second prompt box 011 .
  • the shooting prompt box 02 displayed in the preview screen 01 can be a rectangular dotted frame
  • the adjustment prompt information 012 can be: the proportion of the current projection screen in the preview screen is less than 60%, please set The camera moves close to the projection screen, so as to move the frame of the projection screen out of the shooting prompt box 02.
  • the shooting prompt box 02 displayed in the preview screen 01 may include four spaced boundary lines, and the four spaced boundary lines may enclose a rectangle, and the four spaced boundary lines are located at the four vertices of the rectangle.
  • the adjustment prompt information 012 can be: the current projection screen accounts for less than 60% of the preview image, please move the camera close to the projection screen to move the border of the projection screen out of the shooting prompt frame 02.
  • the shooting device in the process of using the shooting device to shoot the projection screen, if the projection screen in the preview picture is located in the first prompt box, it indicates that the size of the projection screen in the preview picture is small. At this time, the shooting device The camera in is far from the projection screen. Therefore, the user can increase the size of the projection screen in the preview image by shortening the distance between the shooting device and the projection screen. And by displaying the first prompt frame and the second prompt frame in the preview screen, the user can accurately determine the position and size of the frame of the projection screen, and then can accurately determine whether the preview screen meets the requirements, thereby ensuring the shooting image reliability. At the same time, by displaying the first prompt box and the second prompt box, the user can quickly determine how to adjust the size of the projection screen in the preview image, thereby improving the efficiency of image collection.
  • Step 305 displaying shooting prompt information.
  • the shooting device if the shooting device recognizes the frame of the projection screen and the projected image in the preview picture, and the frame of the projection screen in the preview picture is within the target area of the preview picture, the shooting device can determine that The shooting image obtained by shooting on the projection screen meets the requirements, so the shooting prompt information can be displayed.
  • the photographing prompt information is used to prompt to photograph the projection screen.
  • the shooting prompt message 013 may be "please take a picture of the projection screen".
  • Step 306 in response to the shooting operation, acquire the captured image captured by the camera.
  • the photographing device After the photographing device displays the photographing prompt information, if it receives a photographing operation performed by the user based on the photographing prompt information, it may respond to the photographing operation to acquire a photographed image captured by the camera.
  • the shooting interface of the shooting device further displays a shooting button 014 , and the shooting operation may be a click operation on the shooting button 014 .
  • the shooting operation may also be other types of operations, for example, it may also be a voice operation, or a pressing operation for a physical button of the shooting device.
  • Step 307 sending the captured image to the laser projection device.
  • the photographed image can be sent to the laser projection device, and the laser projection device can correct the projection position of the projected image to be displayed on the projection screen based on the photographed image.
  • the projected image is an image used to determine the correction position, so it can also be called a correction image.
  • the projected image to be displayed is an image for displaying video content.
  • the colors of the multiple characteristic graphics included in the pre-stored projection image (that is, the corrected image) in the laser projection device are uniform. The same, and the color of each feature figure is different from the background color of the projected image. If the image projected by the laser projection device onto the projection screen exceeds the projection screen, the laser projection device projects the projected image onto the projection screen during image correction.
  • the projection image may be the projection image 00 shown in FIG. 4 .
  • the correction parameters may include corrected positions of multiple vertices in the projection image to be displayed in the first image coordinate system. If the projected image to be displayed is a quadrilateral, the vertices of the projected image to be displayed may include an upper left vertex, a lower left vertex, an upper right vertex, and a lower right vertex.
  • the following describes the process of the laser projection device determining the corrected position of the target vertex in the first image coordinate system in the projected image to be displayed, wherein the target vertex can be any vertex of the projected image to be displayed:
  • the laser projection device After the laser projection device receives the photographed image sent by the photographing device, it can determine the target projection position of the target characteristic figure on the projection screen according to the perspective transformation coefficient of the camera in the photographing device and the position of the target characteristic figure in the captured image .
  • the target feature graph may be the feature graph closest to the projection position of the target vertex among the multiple feature graphs. For example, assuming that the target vertex of the projected image to be displayed is the upper right vertex, the target feature graphic may be the feature graphic located at the upper right corner among the plurality of feature graphics.
  • the target feature figure may be the feature figure 001 in the upper right corner of the projected image 00 .
  • the laser projection device can determine the actual relative position between the position of the target vertex of the frame of the projection screen and the target projection position, and can determine the initial relative position of the position of the target vertex of the frame and the initial projection position of the target feature figure . Furthermore, the laser projection device can determine the target offset according to the actual relative position and the initial relative position.
  • the target offset is the offset of the target projection position of the target vertex of the projection image on the projection screen relative to its initial projection position.
  • the target vertex of the frame may be a vertex in the same orientation as the target vertex in the projection image to be displayed among the multiple vertices of the frame.
  • the target vertex of the projected image is a vertex in the same orientation as the target vertex in the projected image to be displayed among the plurality of vertices in the projected image. For example, if the target vertex in the projected image to be displayed is the upper right vertex of the second target image, then the target vertex of the frame is the upper right vertex of the frame, and the target vertex of the projected image is the upper right vertex of the projected image.
  • the target offset may be a vector including an offset direction and an offset value.
  • the laser projection device can determine the pixel offset of the target vertex of the second projection image in the first image coordinate system from the pre-stored correspondence based on the target offset, so that the pixel offset can be The displacement and the initial position of the target vertex of the projected image to be displayed in the first image coordinate system determine the corrected position of the target vertex of the projected image to be displayed in the first image coordinate system.
  • the pixel offset may be a vector including an offset direction and an offset value.
  • the perspective transformation coefficient can transform the position of any point on the projection screen into a position in the captured image, that is, the perspective transformation coefficient is a variation coefficient between the screen coordinate system of the projection screen and the second image coordinate system of the captured image.
  • the perspective transformation coefficient is related to the shooting position of the camera, the distance between the camera and the projection screen, and the resolution of the camera.
  • the corresponding relationship may be a corresponding relationship between the offset in the screen coordinate system and the offset in the first image coordinate system.
  • the initial projection position of the target feature figure is the projection position of the target feature figure on the projection screen when the projection image is located on the projection screen.
  • the laser projection device can determine the corrected position of each vertex in the first image coordinate system in the projected image to be displayed, and can transmit the corrected positions of multiple vertices of the projected image to be displayed to the laser projected device.
  • the laser projection device may perform correction processing on the projection image to be displayed according to the correction position of each vertex in the projection image to be displayed in the first image coordinate system, so as to obtain the projection image to be displayed after correction processing.
  • the laser projection device can move the vertex and the pixels between the initial position and the corrected position of the vertex to the corrected position of the vertex, by This realizes correction processing of the projected image to be displayed.
  • the target projection position, the initial projection position, and the positions of multiple vertices of the projection screen of the target feature figure may all refer to positions in the screen coordinate system of the projection screen.
  • the corrected position and the initial position of the vertex in the projected image to be displayed refer to the position in the first image coordinate system of the projected image to be displayed.
  • the position of each feature figure in the captured image refers to the position in the second image coordinate system of the captured image.
  • the origin of the screen coordinate system is the center point of the projection screen
  • the horizontal axis of the screen coordinate system is parallel to the pixel row direction of the projection screen
  • the vertical axis of the screen coordinate system is parallel to the pixel column direction of the projection screen.
  • the origin of the first image coordinate system is the center point of the projection image to be displayed
  • the horizontal axis of the first image coordinate system is parallel to the pixel row direction of the projection image to be displayed
  • the vertical axis of the first image coordinate system is parallel and the pixel column direction of the projected image to be displayed.
  • the origin of the second image coordinate system is the center point of the captured image, the horizontal axis of the second image coordinate system is parallel to the pixel row direction of the captured image, and the vertical axis of the second image coordinate system is parallel to the pixel row direction of the captured image. column direction.
  • the target projection position of the target characteristic figure may include an abscissa and a ordinate
  • the initial projection position of the target feature figure may comprise an abscissa and a ordinate
  • the position of the target vertex of the frame of the projection screen may include abscissa and ordinate.
  • the actual relative position may include: a first absolute value and a second absolute value.
  • the first absolute value is the absolute value of the first difference
  • the first difference is the difference between the value of the abscissa of the position of the target vertex of the border and the value of the abscissa of the target projection position
  • the second absolute value is the second The absolute value of the difference
  • the second difference is the difference between the value of the ordinate of the position of the target vertex of the frame and the value of the ordinate of the target projection position.
  • the initial relative position may include: a third absolute value and a fourth absolute value, the third absolute value is the absolute value of the third difference, the third difference is the value of the abscissa of the position of the target vertex of the border and the initial projection The difference between the values of the abscissa of the position.
  • the fourth absolute value is the absolute value of the fourth numerical value, and the fourth numerical value is a numerical difference between the numerical value of the vertical coordinate of the position of the target vertex of the frame and the numerical value of the vertical coordinate of the initial projection position.
  • the offset value of the above-mentioned target offset may include a first target offset value and a second target offset value, the first target offset value is the absolute value of the difference between the third absolute value and the first absolute value, and the second The target offset value is an absolute value of a difference between the fourth absolute value and the second absolute value.
  • the offset direction of the target offset may include a first direction and a second direction, and the first direction is a direction parallel to the pixel row direction and away from the center point of the screen coordinate system. The second direction is parallel to the pixel column direction and away from the center point of the screen coordinate system.
  • the offset value of the pixel offset may include a first pixel offset value and a second pixel offset value.
  • the target vertex of the border of the projection screen is the upper right vertex as an example.
  • the laser projection device can determine the target projection position of the upper right vertex of the first projected image relative to its initial projection. The position is offset by the first target offset value along the first direction. If the abscissa of the initial position of the upper right vertex in the second projected image is greater than 0 in the first image coordinate system, the laser projection device can determine that the abscissa of the corrected position of the upper right vertex in the second projected image is the second projected image The difference between the abscissa of the initial position of the upper right vertex in the first image coordinate system and the first pixel offset value.
  • the laser projection device can determine that the abscissa of the corrected position of the upper right vertex in the second projected image is the second projected image The sum of the abscissa of the initial position of the upper right vertex in the first image coordinate system and the first pixel offset value.
  • the laser projection device can determine that the target projection position of the upper right vertex of the first projection image is offset by the first target offset in the direction opposite to the first direction relative to its initial projection position. transfer value. If the abscissa of the initial position of the upper right vertex in the second projected image is greater than 0 in the first image coordinate system, the laser projection device can determine that the abscissa of the corrected position of the upper right vertex in the second projected image is the second projected image The sum of the abscissa of the initial position of the upper right vertex in the first image coordinate system and the first pixel offset value.
  • the laser projection device can determine that the abscissa of the corrected position of the upper right vertex in the second projected image is the second projected image The difference between the abscissa of the initial position of the upper right vertex in the first image coordinate system and the first pixel offset value.
  • the laser projection device may determine that the target projection position of the upper right vertex of the first projection image is offset by the second target offset value in the second direction relative to its initial projection position.
  • the laser projection device can use the above method to determine the corrected position of the upper right vertex.
  • the laser projection device can determine that the target projection position of the upper right vertex of the first projected image is offset by the second target position in a direction opposite to the second direction relative to its initial projection position. transfer value.
  • the laser projection device can use the above method to determine the corrected position of the upper right vertex.
  • the laser projection device can determine the corrected positions of the upper left vertex, the lower left vertex, the upper right vertex and the lower right vertex of the projected image to be displayed in the first image coordinate system.
  • the laser projection device may divide the upper right vertex of the projected image to be displayed and the pixels between the initial position of the upper right vertex and the corrected position Adjust to the corrected position. In this way, the correction processing of the projected image to be displayed is realized, that is, the projected image to be displayed is reduced, and the projected image to be displayed is displayed within the frame of the projection screen.
  • the pre-stored projection image (that is, the correction image) in the laser projection device is a checkerboard image. If the image projected by the laser projection device onto the projection screen is distorted, and/or the image exceeds the projection screen, the laser projection device may project the projected image onto the projection screen during image correction.
  • the projection image may be the projection image 00 shown in FIG. 5 .
  • the multiple characteristic figures in the projected image correspond one-to-one to multiple pixel areas of the projected image to be displayed, and the pixel area may include multiple pixels arranged in an array.
  • the correction parameters may include corrected positions of the plurality of pixel regions in the projection image to be displayed in the first image coordinate system.
  • the i-th row and j-th feature pattern in the projected image corresponds to the i-th row and j-th column pixel region in the projected image to be displayed, and each feature pattern is used to determine the corrected position of a corresponding pixel region.
  • i is a positive integer less than or equal to the number of rows of the characteristic graphics included in the projected image
  • j is a positive integer less than or equal to the number of columns of the characteristic graphics included in the projected image.
  • the laser projection device After the laser projection device receives the photographed image sent by the photographing device, for each characteristic figure, the laser projection device can determine the target projection position of the feature figure on the projection screen, and can determine the target projection position and the initial projection position according to the target projection position. The actual offset of the feature graph. Furthermore, the laser projection device can determine the pixel offset in the first image coordinate system of the pixel region corresponding to the characteristic figure in the projected image to be displayed according to the actual deviation of the characteristic figure. And the correction position of the pixel area can be determined according to the pixel offset of the pixel area. It can be understood that the pixel offset may be a vector including an offset direction and an offset value.
  • the laser projection device can obtain the corrected position of each pixel area in the projected image to be displayed. Furthermore, the laser projection device can correct the pixels in each pixel area in the projected image to be displayed from the initial position of the pixel area in the first image coordinate system to the corrected position of the pixel area in the first image coordinate system, and obtain the correction process The final projected image to be displayed, thereby realizing the correction processing of the projected image to be displayed, ensuring that the projected image displayed on the deformed projection screen will not be deformed, and/or the projected image will not exceed the projection screen, Therefore, it is ensured that the display effect of the projected image is better.
  • the laser projection device can obtain the corrected position of each pixel area in the projected image to be displayed. Furthermore, the laser projection device can correct the pixels in each pixel area in the projected image to be displayed from the initial position of the pixel area in the first image coordinate system to the corrected position of the pixel area in the first image coordinate system, and obtain the correction process The projected image to be displayed is corrected, so as to ensure that the projected image displayed on the deformed projection screen will not be deformed, thereby ensuring a better display effect of the projected image.
  • step 304 can be deleted according to circumstances. Any person skilled in the art within the technical scope disclosed in the present disclosure can easily think of various methods that should be included in the protection scope of the present disclosure, and thus will not be repeated here.
  • the embodiments of the present disclosure provide an image correction method, which can send the captured image to the laser projection device after acquiring the captured image captured by the camera on the projection screen.
  • the laser projection device corrects the projected image to be displayed based on the captured image, thereby preventing the projected image to be displayed from exceeding the projection screen, thereby ensuring the display effect of the projected image.
  • the photographing device detects that the frame of the projection screen in the preview image is outside the target area of the preview image, it can determine that the captured image captured by the camera does not meet the requirements at this time, and thus displays an adjustment prompt message.
  • the user can adjust the shooting parameters of the camera in time to ensure that the size of the projection screen in the captured image captured by the camera meets the requirements, thereby ensuring the reliability of the captured captured image, and further improving the correction of the projected image to be displayed based on the captured image. reliability.
  • Fig. 10 is a schematic structural diagram of a photographing device provided by an embodiment of the present disclosure, the photographing device 10 includes a camera 101, and the photographing device 10 is used for:
  • a preview screen captured by the camera is displayed, the preview screen includes a projection screen, and a projection image is displayed on the projection screen.
  • an adjustment prompt message is displayed, and the adjustment prompt information is used to prompt adjustment of shooting parameters of the camera.
  • the captured image captured by the camera is acquired.
  • the captured image is sent to the laser projection device, and the captured image is used for the laser projection device to correct the projection image to be displayed based on the captured image.
  • the embodiment of the present disclosure provides a photographing device, which can send the photographed image to the laser projection device after acquiring the photographed image obtained by the camera on the projection screen. So that the laser projection device corrects the projected image to be displayed based on the captured image, thereby preventing the projected image to be displayed from exceeding the projection screen, thereby ensuring the display effect of the projected image.
  • the photographing device detects that the frame of the projection screen in the preview image is outside the target area of the preview image, it can determine that the captured image captured by the camera does not meet the requirements at this time, and thus displays an adjustment prompt message.
  • the user can adjust the shooting parameters of the camera in time to ensure that the size of the projection screen in the captured image captured by the camera meets the requirements, thereby ensuring the reliability of the captured captured image, and further improving the correction of the projected image to be displayed based on the captured image. reliability.
  • the adjustment prompt information is also used to prompt that the frame of the projection screen is outside the target area of the preview image.
  • the photographing device 10 is also used for:
  • the position of the frame of the projection screen in the preview image is detected.
  • the photographing device 10 is also used for:
  • a photographing prompt message is displayed, and the photographing prompt message is used to prompt photographing the projection screen.
  • the photographing device 10 is also used for:
  • a shooting prompt box is displayed at the target position in the preview image, and the adjustment prompt information is also used to prompt to move the frame of the projection screen to the target area defined by the shooting prompt frame.
  • the target area is an area in the preview screen other than the area enclosed by the shooting prompt frame
  • the shooting prompt frame includes a first prompt frame and a second prompt frame surrounding the first prompt frame, and the target area is an area between the first prompt frame and the second prompt frame.
  • the embodiment of the present disclosure provides a photographing device, which can send the photographed image to the laser projection device after acquiring the photographed image obtained by the camera on the projection screen.
  • the laser projection device corrects the projected image to be displayed based on the captured image, thereby preventing the projected image to be displayed from exceeding the projection screen, thereby ensuring the display effect of the projected image.
  • the photographing device detects that the frame of the projection screen in the preview image is outside the target area of the preview image, it can determine that the captured image captured by the camera does not meet the requirements at this time, and thus displays an adjustment prompt message.
  • the user can adjust the shooting parameters of the camera in time to ensure that the size of the projection screen in the captured image captured by the camera meets the requirements, thereby ensuring the reliability of the captured captured image, and further improving the correction of the projected image to be displayed based on the captured image. reliability.
  • FIG. 11 is a schematic structural diagram of a laser projection device provided by an embodiment of the present disclosure.
  • the laser projection device 20 may include a parameter determination circuit 2001 , an image processing circuit 3001 , a display control circuit 3002 , a light valve 400 and a projection lens 500 .
  • the parameter determination circuit 2001 is integrated in the control chip 2002 of the motherboard 200 .
  • the control chip 2002 may be a system-on-chip (SOC).
  • the parameter determination circuit 2001 is connected to the image processing circuit 3001 , and the parameter determination circuit 2001 is used to determine a correction parameter based on the captured image, and transmit the correction parameter to the image processing circuit 3001 .
  • the photographing device can photograph the projection screen and the projected image to obtain a photographed image, and can send the photographed image to the parameter determination circuit 2001 in the laser projection device .
  • the parameter determination circuit 2001 can determine correction parameters based on the captured image.
  • the projected image can include a plurality of characteristic patterns arranged in an array, the colors of the plurality of characteristic patterns are the same, and the color of each characteristic pattern is different from the background color of the projected image, for example, the projected image can be as shown in Figure 4 Projected image 00 shown.
  • the correction parameters may include corrected positions of multiple vertices in the projected image to be displayed.
  • the correction parameters can include corrected positions of multiple pixel regions in the projected image to be displayed.
  • the image processing circuit 3001 is connected with the display control circuit 3002 , and the image processing circuit 3001 is used for correcting the projected image to be displayed based on the correction parameters, and transmitting the corrected projected image to be displayed to the display control circuit 3002 .
  • the display control circuit 3002 is used to generate a light valve control signal based on the corrected projected image to be displayed, control the light valve 400 to modulate the light beam irradiated on its surface into an image light beam based on the light valve control signal, and control the light valve 400 based on the light valve control signal.
  • the light valve 400 projects the image beam to the projection lens 500 .
  • the projection lens 500 is used to transmit the image beam to the projection screen, so as to correct the projection position of the corrected projection image to be displayed on the projection screen.
  • the display control circuit 3002 After the display control circuit 3002 receives the corrected projection image to be displayed transmitted by the image processing circuit 3001, it can generate the control signal of the light valve 400 based on the pixel value of the corrected projection image to be displayed, and based on the The light valve control signal controls the light valve 400 . Under the control of the light valve control signal, the light valve 400 modulates the beam irradiated on its surface into an image beam, and transmits the image beam to the projection lens 500 .
  • the projection lens 500 can project the image light beam transmitted by the light valve 400 to the projection screen, so as to realize the correction of the projection position of the projection image to be displayed after the correction process, thereby realizing the correction of the projection position of the projection image to be displayed on the projection screen .
  • the embodiment of the present disclosure provides a laser projection device. Since the image processing circuit can perform correction processing on the projection image to be displayed based on the correction parameters determined by the parameter determination circuit, the display control circuit can further make the corrected processed image
  • the projected image to be displayed is projected onto the projection screen, thereby realizing the correction of the projected image to be displayed, preventing the projected image from exceeding the projection screen, or deformation of the projected image displayed on the projection screen, and ensuring the display effect of the projected image .
  • the parameter determination circuit is integrated on the control chip of the main board, the internal structure of the laser projection device is effectively simplified, and the integration degree of the laser projection device is improved.
  • the laser projection device may include a display panel 300, the display panel 300 may include a digital light processing (digital light processing, DLP) chip 3003, and the image processing circuit 3001 may be integrated in the DLP chip 3003.
  • DLP digital light processing
  • the parameter determination circuit 2001 and the image processing circuit 3001 may be connected based on a universal serial bus (universal serial bus, USB) protocol.
  • the USB protocol may be a USB2.0 protocol, and the transfer rate of the USB2.0 protocol may reach 60 megabits per second (MB/s). That is, the parameter determination circuit 2001 can transmit 60 MB of correction parameters to the image transmission circuit per second.
  • the parameter determination circuit 2001 and the image processing circuit 3001 can be connected through the USB protocol, the parameter determination circuit 2001 can transmit more data to the image processing circuit 3001 at one time (for example, the data of multiple pixel regions in the projected image to be displayed can be transmitted. Correction position) improves the efficiency of the transmission of the correction parameters, thereby improving the efficiency of the projection image correction.
  • the laser projection device may further include a USB interface circuit 2003 , a switch circuit 2004 and a switch control circuit 2005 located on the motherboard 200 .
  • the USB interface circuit 2003 may be a USB hub
  • the switch circuit may be a usb switch circuit.
  • the USB interface circuit 2003 is respectively connected to the first end of the parameter determination circuit 2001 and the switch circuit 2004, the second end of the switch circuit 2004 is connected to the image processing circuit 3001, and the control end of the switch circuit 2004 is connected to the switch control circuit 2005.
  • the USB interface circuit 2003 is respectively connected to the first end of the parameter determination circuit 2001 and the switch circuit 2004 based on the USB protocol, and the second end of the switch circuit 2004 is connected to the image processing circuit 3001 based on the USB protocol.
  • the parameter determination circuit 2001 is used to transmit the calibration parameters to the USB interface circuit 2003
  • the USB interface circuit 2003 is used to transmit the calibration parameters to the switch circuit 2004
  • the switch circuit 2004 is used for controlling the conduction of the first terminal and the second terminal in response to the switch signal sent by the switch control circuit 2005 , and transmitting the correction parameters to the image processing circuit 3001 .
  • the laser projection device may further include a control circuit 2006 located on the main board 200 , and the control circuit 2006 is respectively connected to the parameter determination circuit 2001 , the switch control circuit 2005 and the USB interface circuit 2003 .
  • the parameter determination circuit 2001 determines the correction parameter, it can transmit the correction parameter to the control circuit 2006 .
  • the control circuit 2006 can send a switch signal to the switch control circuit 2005 .
  • the switch control circuit 2005 can control the first terminal and the second terminal of the switch circuit 2004 to conduct in response to the switch signal, so that after the USB interface circuit 2003 sends the calibration parameter to the switch circuit 2004, the switch circuit 2004 can send The correction parameters are sent to the image processing circuit 3001 .
  • the laser projection device may further include a connector 2007 on the main board 200, and the connector 2007 is respectively connected to the second end of the switch circuit 2004 and the image processing circuit 3001 based on the USB protocol.
  • the switch circuit 2004 is used to transmit the correction parameters to the image processing circuit 3001 through the connector.
  • the laser projection device may also include a first interface 2008 located on the motherboard, one end of the first interface 2008 is connected to the third end of the switch circuit 2004, and the other end of the first interface 2008 is used to connect external devices .
  • the control circuit 2006 is further configured to transmit a control signal to the switch control circuit 2005 after detecting an instruction to connect the external device to the first interface 2008 .
  • the switch control circuit 2005 is also used for controlling the third terminal and the second terminal of the switch circuit 2004 to conduct in response to the control signal.
  • the first interface 2008 is used to transmit the data transmitted by the external device to the switch circuit 2004 .
  • the switch circuit 2004 is used to control the conduction of the third terminal and the second terminal in response to the switch signal sent by the switch control circuit 2005 , so as to transmit the data transmitted by the external device to the image processing circuit 3001 .
  • the parameter determination circuit 2001 can transmit correction parameters with a large amount of data to the image processing circuit through the switch circuit 2004, thereby improving the efficiency of correction parameter transmission.
  • the parameter determination circuit 2001 and the image processing circuit 3001 are connected based on the I2C protocol.
  • the parameter determination circuit 2001 can transmit a small amount of data to the image processing circuit 3001 (for example, can transmit the corrected positions of multiple vertices in the projected image to be displayed).
  • the laser projection device may further include a main control circuit 3004 located on the display panel 300, the main control circuit 3004 is respectively connected with the parameter determination circuit 2001 and the image processing circuit 3001 based on the I2C protocol.
  • the parameter determination circuit 2001 is used to transmit the correction parameters to the image processing circuit 3001 through the main control circuit 3004 .
  • the main control circuit 3004 may be a micro control unit (micro controller unit, MCU).
  • the parameter determining circuit 2001 can transmit the correction parameter to the main control circuit 3004 , and then the main control circuit 3004 can transmit the correction parameter to the image processing circuit 3001 .
  • the laser projection device may further include a target interface circuit 3005 located on the display panel 300, one end of the target interface circuit 3005 is connected to the connector 2007, and the other end of the target interface circuit 3005 is respectively connected to the main control circuit 3004 and the main control circuit 3004.
  • the image processing circuit 3001 is connected.
  • the target interface circuit 3005 is used to transmit the data transmitted by the first interface to the main control circuit 3004 and the image processing circuit 3001 respectively.
  • the target interface circuit 3005 may be a USB hub.
  • the laser projection device may also include a second interface 2009 and a third interface 2010 located on the motherboard 200, one end of the second interface 2009 is connected to the USB interface circuit 2003, and the other end is used to connect to an external device .
  • the second interface 2009 is used to transmit the data transmitted by the external device to the control circuit 2006 .
  • One end of the third interface 2010 is connected to the USB interface circuit 2003, and the other end is used for connecting external devices.
  • the third interface 2010 is used to transmit the data transmitted by the external device to the control circuit 2006 .
  • the laser projection device may further include a fourth interface 2011 , a fifth interface 2012 and a sixth interface 2013 located on the motherboard 200 .
  • One end of the fourth interface 2011 is connected to the control circuit 2006, and the other end is used to establish a communication connection with an external device, for example, the communication connection may be a WIFI connection.
  • the control circuit 2006 can establish a WIFI connection with the shooting device through the fourth interface 2011, and can receive network data sent by the shooting device.
  • the network data may be a captured image, and the control circuit 2006 may further send the captured image to the parameter determination circuit 2001 .
  • One end of the fifth interface 2012 is connected to the control circuit 2006 , the fifth interface 2012 is used for receiving voice data, and transmitting the received voice data to the control circuit 2006 .
  • One end of the sixth interface 2013 is connected to the control circuit 2006, and the other end of the sixth interface 2013 establishes a communication connection with the camera on the projection screen, and can receive video images collected by the camera.
  • the control circuit 2006 is also connected to the first memory 2014 , and the control circuit 2006 is used to receive the stored data transmitted by the first memory 2014 .
  • the laser projection device may also include a second memory 2015, which is connected to the display control circuit 3002, and the display control circuit 3002 is used to store the pixel values of the pixels in the projected image into the second memory 2015.
  • the embodiment of the present disclosure provides a laser projection device. Since the image processing circuit can perform correction processing on the projection image to be displayed based on the correction parameters determined by the parameter determination circuit, the display control circuit can further make the corrected processed image
  • the projected image to be displayed is projected onto the projection screen, so as to realize the correction of the projected image to be displayed, to prevent the projected image from exceeding the projection screen, or the projected image displayed on the projection screen to be deformed, so as to ensure the display effect of the projected image .
  • the parameter determination circuit is integrated on the control chip of the main board, the internal structure of the laser projection device is effectively simplified, and the integration degree of the laser projection device is improved.
  • An embodiment of the present disclosure provides a photographing device, including: a memory, a processor, and a computer program stored on the memory.
  • the processor executes the computer program, the above-mentioned method embodiment (for example, any one of FIG. 2 or FIG. 3 ) is implemented. shown example).
  • An embodiment of the present disclosure provides a computer-readable storage medium, where instructions are stored in the computer-readable storage medium, and the instructions are loaded and executed by a processor to implement the method described in the above-mentioned embodiment (for example, any one of FIG. 2 or FIG. 3 ). shown example).
  • An embodiment of the present disclosure provides a computer program product containing instructions, which, when the computer program product is run on a computer, cause the computer to execute the above-mentioned method embodiment (such as the embodiment shown in any one of FIG. 2 or FIG. 3 ).
  • the terms “first”, “second”, “third”, “fourth”, fifth” and “sixth” are used for descriptive purposes only, and should not be understood as indicating or implying relative Importance.
  • the meaning of the term “multiple” in the embodiments of the present disclosure refers to two or more than two.
  • the "and/or” in the embodiments of the present disclosure is only a description of the relationship between associated objects, indicating that there may be three A relationship, for example, A and/or B, can mean: A exists alone, A and B exist simultaneously, and B exists alone.

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Optics & Photonics (AREA)
  • Human Computer Interaction (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • General Health & Medical Sciences (AREA)
  • Projection Apparatus (AREA)
  • Controls And Circuits For Display Device (AREA)
  • Transforming Electric Information Into Light Information (AREA)

Abstract

本申请公开了一种图像校正方法及拍摄设备，属于投影显示领域。该方法在获取到对投影屏幕进行拍摄得到的拍摄图像后，可以将该拍摄图像发送至激光投影设备。以使得激光投影设备基于拍摄图像校正待显示的投影图像的投影位置，由此确保投影图像的显示效果。并且，拍摄设备若检测到预览画面中投影屏幕的边框位于预览画面的目标区域之外，则可以显示调整提示信息。

Description

图像校正方法及拍摄设备
相关申请的交叉引用
本申请要求在2021年5月25日提交中国专利局、申请号为202110571992.3，发明名称为一种激光投影机的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本公开涉及投影显示领域，特别涉及一种图像校正方法及拍摄设备。
背景技术
超短焦激光投影设备可以将投影图像投影显示至投影屏幕上。对于超短焦激光投影设备而言，由于投影成像的原理使得光线斜向上出射，因此超短焦激光投影设备中的光学引擎出射的激光光束与投影屏幕之间的位置必须严格对位，超短焦激光投影设备轻微的移位也会导致画面的形变或畸变。若用户不小心移动了超短焦激光投影设备，则超短焦激光投影设备投影显示的投影图像可能会超出投影屏幕，导致显示的投影图像的显示效果较差。
发明内容
本申请一方面，提供了一种图像校正方法，应用于拍摄设备，所述拍摄设备包括摄像头，所述方法包括：
显示所述摄像头采集的预览画面，所述预览画面中包含投影屏幕，所述投影屏幕中显示有投影图像；
若检测到所述预览画面中所述投影屏幕的边框位于所述预览画面的目标区域之外，则显示调整提示信息，所述调整提示信息用于提示调整所述摄像头的拍摄参数；
响应于拍摄操作，获取所述摄像头采集的拍摄图像；
将所述拍摄图像发送至激光投影设备，所述拍摄图像用于供所述激光投影设备基于所述拍摄图像对待显示的投影图像进行校正。
本申请另一方面，提供了一种拍摄设备，所述拍摄设备包括摄像头，所述拍摄设备用于：
显示所述摄像头采集的预览画面，所述预览画面中包含投影屏幕，所述投影屏幕中显示有投影图像；
若检测到所述预览画面中所述投影屏幕的边框位于所述预览画面的目标区域之外，则显示调整提示信息，所述调整提示信息用于提示调整所述摄像头的拍摄参数；
响应于拍摄操作，获取所述摄像头采集的拍摄图像；
将所述拍摄图像发送至激光投影设备，所述拍摄图像用于供所述激光投影设备基于所述拍摄图像对待显示的投影图像进行校正。
附图说明
为了更清楚地说明本公开实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本公开的一些实施例，对于本 领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是本公开实施例提供的一种图像校正方法所涉及的实施环境；
图2是本公开实施例提供的一种图像校正方法的流程图；
图3是本公开实施例提供的另一种图像校正方法的流程图；
图4是本公开实施例提供的一种投影图像的示意图；
图5是本公开实施例提供的另一种投影图像的示意图；
图6是本公开实施例提供的一种第一提示框和第二提示框的示意图；
图7是本公开实施例提供的另一种第一提示框和第二提示框的示意图；
图8是本公开实施例提供的一种拍摄提示框的示意图；
图9是本公开实施例提供的另一种拍摄提示框的示意图；
图10是本公开实施例提供的一种拍摄设备的结构示意图；
图11是本公开实施例提供的另一种激光投影设备的结构示意图；
图12是本公开实施例提供的再一种激光投影设备的结构示意图；
图13是本公开实施例提供的再一种激光投影设备的结构示意图；
图14是本公开实施例提供的再一种激光投影设备的结构示意图；
图15是本公开实施例提供的再一种激光投影设备的结构示意图；
图16是本公开实施例提供的再一种激光投影设备的结构示意图。
具体实施方式
为使本公开的目的、技术方案和优点更加清楚，下面将结合附图对本公开实施方式作进一步地详细描述。
图1是本公开实施例提供的一种图像校正方法所涉及的实施环境。如图1所示，该实施环境可以包括：拍摄设备10和激光投影设备20。
其中，该拍摄设备10可以为设置有摄像头的设备，例如，该拍摄设备10可以为手机、个人电脑、笔记本电脑或平板电脑等设置有摄像头的设备。该激光投影设备20可以为超短焦激光投影设备。该拍摄设备10与该激光投影设备20之间可以通过有线网络或无线网络建立连接。
图2是本公开实施例提供的一种图像校正方法的流程图。该方法可以应用于图1所示的拍摄设备10中。如图2所示，该方法可以包括：
步骤201、显示摄像头采集的预览画面。
在本公开实施例中，在激光投影设备将投影图像投射至投影屏幕之后，拍摄设备可以通过摄像头对该投影屏幕进行采集，并可以显示该摄像头采集的预览画面。该预览画面中可以包含投影屏幕的边框和投影图像。在一具体实施中，该投影图像可以包括阵列排布的多个特征图形，该特征图形可以为十字形或者四边形等。
在一具体实施中，拍摄设备中可以安装有拍摄应用，拍摄设备可以在启动该拍摄应用后，在该拍摄应用的拍摄界面中显示摄像头采集的预览画面。
步骤202、若检测到预览画面中投影屏幕的边框位于预览画面的目标区域之外，则显示调整提示信息。
拍摄设备显示摄像头采集的预览画面后，可以检测该预览画面中投影屏幕的边框的位 置。若该投影屏幕的边框的位置位于预览画面的目标区域之外，则拍摄设备可以确定此时摄像头采集的拍摄图像不符合要求，因此可以显示调整提示信息。
其中，该调整提示信息用于提示调整摄像头的拍摄参数。在一具体实施中，该拍摄参数可以包括：摄像头与投影屏幕之间的距离，和/或，摄像头的焦距。
步骤203、响应于拍摄操作，获取摄像头采集的拍摄图像。
拍摄设备还可以响应于拍摄操作获取摄像头采集的拍摄图像。在一具体实施中，拍摄设备的拍摄界面还显示有拍摄按钮，该拍摄操作可以是针对该拍摄按钮的点击操作。
步骤204、将拍摄图像发送至激光投影设备。
拍摄设备在获取到拍摄图像之后，可以将该拍摄图像发送至激光投影设备，该激光投影设备可以基于该拍摄图像对待显示的投影图像进行校正。
综上所述，本公开实施例提供了一种图像校正方法，该方法在获取到摄像头对投影屏幕进行拍摄得到的拍摄图像后，可以将该拍摄图像发送至激光投影设备。以使得激光投影设备基于拍摄图像对待显示的投影图像进行校正，由此避免待显示的投影图像超出投影屏幕，从而确保投影图像的显示效果。
并且，拍摄设备若检测到预览画面中投影屏幕的边框位于预览画面的目标区域之外，则可以确定此时摄像头采集的拍摄图像不符合要求，因此显示调整提示信息。由此，可以使得用户及时调整摄像头的拍摄参数，确保摄像头采集的拍摄图像中投影屏幕的尺寸符合要求，从而确保采集的拍摄图像的可靠性，进而提高基于该拍摄图像对待显示的投影图像进行校正的可靠性。
图3是本公开实施例提供的另一种图像校正方法的流程图。该方法可以应用于图1所示的拍摄设备10中。如图3所示，该方法可以包括：
步骤301、显示摄像头采集的预览画面。
在本公开实施例中，在激光投影设备将投影图像投射显示至投影屏幕之后，拍摄设备可以通过摄像头对该投影屏幕进行采集，并可以显示该摄像头采集的预览画面。在一具体实施中，该预览画面中可以包含投影屏幕的边框和投影图像。其中，该投影图像可以包括阵列排布的多个特征图形，每个特征图形可以为四边形或者十字形等。
在一具体实施中，多个特征图形的颜色可以均相同，且每个特征图形的颜色与投影图像的背景色不同。参考图4，投影图像00可以包括4×4个共16个特征图形001，该每个特征图形001可以为十字形，该每个特征图形001的颜色可以为黑色，该投影图像00的背景色可以为白色。
或者，投影图像可以为棋盘格图像，该投影图像可以包括阵列排布的多个黑色特征图形和多个白色特征图形，该每个黑色特征图形与一个白色特征图形相邻。参考图5，投影图像00可以包括18×32共576个特征图形001，该576个特征图形001包括多个黑色特征图形和多个白色特征图形，且每个黑色特征图形与一个白色特征图形相邻。
在一具体实施中，拍摄设备中可以安装有拍摄应用，拍摄设备可以在启动该拍摄应用后，在该拍摄应用的拍摄界面中显示摄像头采集的预览画面。
步骤302、检测预览画面是否存在投影屏幕的边框和投影图像。
拍摄设备在显示摄像头采集的预览画面之后，可以检测该预览画面中是否存在投影屏幕的边框和投影图像。若该预览画面中存在投影屏幕的边框和投影图像，则可以执行步骤 303。若该预览画面中不存在投影屏幕的边框和投影图像，则可以结束流程。
在本公开实施例中，该投影屏幕可以包括投影区域和围绕该投影区域的边框。该投影图像中的特征图形位于该边框内。其中，该边框可以为封闭的多边形，例如矩形。并且，该边框的颜色与该投影区域的颜色可以不同。
在一具体实施中，拍摄设备在显示摄像头采集的预览画面之后，可以采用目标检测算法检测该预览画面中是否存在投影屏幕的边框和投影图像。例如，拍摄设备中可以预先存储有投影屏幕的边框的模板和特征图形的模板，该目标检测算法可以为基于模板匹配的检测算法。可以理解的是，拍摄设备确定预览画面中存在投影屏幕的边框指的是在该预览画面中识别到完整的边框。
步骤303、检测预览画面中投影屏幕的边框是否位于预览画面的目标区域之外。
拍摄设备在预览画面中识别到投影屏幕的边框和投影图像后，可以确定预览画面中投影屏幕的边框的位置。若该投影屏幕的边框的位置位于预览画面的目标区域之外，则拍摄设备可以确定此时采用摄像头采集的拍摄图像不符合要求，因此可以执行步骤304。若该投影屏幕的边框的位置位于预览画面的目标区域之内，则拍摄设备可以确定此时采用摄像头采集的拍摄图像符合要求，因此可以执行步骤305。
其中，该投影屏幕的边框的位置位于目标区域之内指的是该边框的各条边均位于该目标区域之内。该目标区域可以为预览画面中的固定区域，且当投影屏幕的边框位于该目标区域内时，预览画面内投影屏幕的大小较为合适，便于激光投影设备识别投影图形中特征图形的位置，进而基于该特征图形的位置对待显示的投影图像的投影位置进行校正。
在一具体实施中，该目标区域可以为环形区域，例如可以是矩形环状区域。拍摄设备中预先存储有比值范围，该比值范围的上限可以为该目标区域的外环面积与预览画面的面积的比值，比值范围的下限可以为该目标区域的内环面积与预览画面的面积的比值。
拍摄设备在预览画面中识别到投影屏幕的边框和投影图像后，可以计算预览画面中投影屏幕的面积与预览画面的面积的比值。若该比值处于比值范围之外，则拍摄设备可以确定投影屏幕的边框位于预览画面的目标区域之外。若该比值处于比值范围之内，则拍摄设备可以确定投影屏幕的边框位于预览画面的目标区域之内。该投影屏幕的面积是指该投影屏幕的边框的所有边围成的区域的面积。
示例的，假设该比值范围的下限为60％，该比值范围的上限为1。若拍摄设备检测到预览画面中投影屏幕的面积与预览画面的面积的比值为50％，则由于50％<60％，因此拍摄设备可以确定投影屏幕的边框位于预览画面的目标区域之外，因此可以执行步骤304。
步骤304、显示调整提示信息。
拍摄设备若在预览画面中识别到投影屏幕的边框和投影图像，且检测到投影屏幕的边框位于预览画面的目标区域之外，则可以显示调整提示信息。其中，该调整提示信息用于提示调整摄像头的拍摄参数。在一具体实施中，该拍摄参数可以包括摄像头与投影屏幕之间的距离，和/或，摄像头的焦距。
在一具体实施中，该调整提示信息还用于提示投影屏幕的边框位于预览画面的目标区域之外。
在一具体实施中，该调整提示信息还用于提示比值未处于比值范围内。示例的，若该比值为50％，比值范围的下限为60％，则该调整提示信息可以为当前投影屏幕在预览画面中的占比小于60％。
在本公开实施例中，拍摄设备还可以在预览画面中的目标位置处显示拍摄提示框，该调整提示信息还用于提示将投影屏幕的边框移动至拍摄提示框限定的目标区域内。
其中，该目标位置可以为预览画面的中心点所在位置，该拍摄提示框的中心点可以与该预览画面的中心点重合。
该目标区域可以为预览画面中除拍摄提示框围成的区域之外的区域。或者该拍摄提示框可以包括第一提示框和环绕该第一提示框的第二提示框，该目标区域可以为第一提示框和第二提示框之间的区域，该调整提示信息还用于提示将投影屏幕的边框移动至该第一提示框和第二提示框之间。在一具体实施中，该第一提示框和第二提示框可以为多边形。例如，第一提示框和第二提示框均可以为四边形。或者，该第一提示框和第二提示框均可以为非封闭的图形，该非封闭的图形包括多条间隔的边界线。
示例的，参考图6，该预览画面01中显示的第一提示框010和围绕该第一提示框010的第二提示框011均可以为一个矩形的虚线框，该调整提示信息012可以为：当前投影屏幕在预览画面中的占比小于60％，请将摄像头靠近投影屏幕，以将投影屏幕的边框移动至第一提示框010和第二提示框011之间。
示例的，参考图7，该预览画面01中显示的第一提示框010和围绕该第一提示框010的第二提示框011均可以包括四条间隔的边界线，该四条间隔的边界线可以围成矩形，且该四条间隔的边界线位于矩形的四个顶角处。该调整提示信息012可以为：当前投影屏幕在预览画面中的占比小于60％，请将摄像头靠近投影屏幕，以将投影屏幕的边框移动至第一提示框010和第二提示框011之间。
示例的，参考图8，该预览画面01中显示的拍摄提示框02可以为一个矩形的虚线框，该调整提示信息012可以为：当前投影屏幕在预览画面中的占比小于60％，请将摄像头靠近投影屏幕，以将投影屏幕的边框移动至拍摄提示框02之外。
示例的，参考图9，该预览画面01中显示的拍摄提示框02可以包括四条间隔的边界线，该四条间隔的边界线可以围成矩形，且该四条间隔的边界线位于矩形的四个顶角处，该调整提示信息012可以为：当前投影屏幕在预览画面中的占比小于60％，请将摄像头靠近投影屏幕，以将投影屏幕的边框移动至拍摄提示框02之外。
在本公开实施例中，在采用拍摄设备对投影屏幕进行拍摄的过程中，若预览画面中的投影屏幕位于该第一提示框内，表明预览画面中投影屏幕的尺寸较小，此时拍摄设备中的摄像头距离投影屏幕较远。因此用户可以通过缩短拍摄设备与投影屏幕之间的距离，以增大预览画面中投影屏幕的尺寸。且通过在预览画面中显示第一提示框和第二提示框，使得用户可以准确的确定投影屏幕的边框的位置和大小，进而可以准确的确定出该预览画面是否符合要求，从而确保拍摄的拍摄图像的可靠性。同时通过显示第一提示框和第二提示框，使得用户可以快速确定出如何调整预览画面中投影屏幕的尺寸，提高对拍摄图像采集的效率。
步骤305、显示拍摄提示信息。
在本公开实施例中，拍摄设备若在预览画面中识别到投影屏幕的边框和投影图像，且该预览画面中投影屏幕的边框位于预览画面的目标区域之内，则拍摄设备可以确定此时对投影屏幕进行拍摄得到的拍摄图像符合要求，因此可以显示拍摄提示信息。其中，该拍摄提示信息用于提示对投影屏幕进行拍摄。示例的，参考图6、图7、图8和图9，该拍摄提示信息013可以为“请对投影屏幕拍摄”。
步骤306、响应于拍摄操作，获取摄像头采集的拍摄图像。
拍摄设备显示拍摄提示信息后，若接收到用户基于该拍摄提示信息执行的拍摄操作，则可以响应于拍摄操作获取摄像头采集的拍摄图像。在一具体实施中，参考图6、图7、图8和图9，拍摄设备的拍摄界面还显示有拍摄按钮014，该拍摄操作可以是针对该拍摄按钮014的点击操作。当然，该拍摄操作还可以为其他类型的操作，例如还可以为语音操作，或针对拍摄设备的物理按键的按压操作等。
步骤307、将拍摄图像发送至激光投影设备。
拍摄设备在获取到拍摄图像之后，可以将该拍摄图像发送至激光投影设备，该激光投影设备可以基于该拍摄图像校正待显示的投影图像在投影屏幕的投影位置。可以理解的是，该投影图像为用于确定校正位置的图像，因此也可以称为校正图像。该待显示的投影图像是用于显示视频内容的图像。
在本公开实施例一种在一具体实施中实现方式中，若投影屏幕的平整度较好，则激光投影设备中预先存储的投影图像(即校正图像)中包括的多个特征图形的颜色均相同，且每个特征图形的颜色与投影图像的背景色不同。若激光投影设备投射至投影屏幕的图像超出投影屏幕，则在进行图像校正过程中，激光投影设备将该投影图像投射至投影屏幕。
例如，该投影图像可以为图4所示的投影图像00。相应的，校正参数可以包括待显示的投影图像中多个顶点在第一图像坐标系的校正位置。若待显示的投影图像为四边形，则该待显示的投影图像的顶点可以包括左上顶点、左下顶点、右上顶点和右下顶点。
下文对激光投影设备确定待显示的投影图像中目标顶点在第一图像坐标系的校正位置的过程进行介绍，其中该目标顶点可以为待显示的投影图像的任一顶点：
首先，激光投影设备在接收到拍摄设备发送的拍摄图像之后，可以根据拍摄设备中摄像头的透视变换系数和目标特征图形在拍摄图像中的位置，确定该目标特征图形在投影屏幕中的目标投影位置。该目标特征图形可以为多个特征图形中距离该目标顶点的投影位置最近的特征图形。例如，假设该待显示的投影图像的目标顶点为右上顶点，则该目标特征图形可以为多个特征图形中位于右上角的特征图形。
示例的，参考图4，该目标特征图形可以为投影图像00中右上角的特征图形001。
之后，激光投影设备可以确定投影屏幕的边框的目标顶点的位置与该目标投影位置之间的实际相对位置，并可以确定该边框的目标顶点的位置与目标特征图形的初始投影位置的初始相对位置。进而激光投影设备可以根据该实际相对位置和初始相对位置确定目标偏移量。该目标偏移量即为投影图像的目标顶点在投影屏幕的目标投影位置相对于其初始投影位置的偏移量。其中，该边框的目标顶点可以为边框的多个顶点中与待显示的投影图像中的目标顶点处于相同方位上的顶点。投影图像的目标顶点为投影图像的多个顶点中与待显示的投影图像中的目标顶点处于相同方位上的顶点。示例的，若待显示的投影图像中的目标顶点为第二目标图像的右上顶点，则该边框的目标顶点为该边框的右上顶点，该投影图像的目标顶点为该投影图像的右上顶点。
可以理解的是，该目标偏移量可以为包括偏移方向和偏移数值大小的矢量。
进一步的，激光投影设备可以基于该目标偏移量，从预先存储的对应关系中确定出第二投影图像的目标顶点在第一图像坐标系中的像素偏移量，由此可以根据该像素偏移量以及该待显示的投影图像的目标顶点在第一图像坐标系中初始位置，确定出该待显示的投影图像的目标顶点在第一图像坐标系的校正位置。
其中，该像素偏移量可以为包括偏移方向和偏移数值大小的矢量。该透视变换系数能够将投影屏幕中任一点的位置变换为在拍摄图像中的位置，即该透视变换系数为投影屏幕的屏幕坐标系与拍摄图像的第二图像坐标系之间的变化系数。该透视变换系数与该摄像机的拍摄位置、该摄像机与投影屏幕的距离以及该摄像机的分辨率相关。该对应关系可以为在屏幕坐标系中的偏移量与在第一图像坐标系中的偏移量的对应关系。该目标特征图形的初始投影位置为该投影图像位于投影屏幕内时，该目标特征图形在投影屏幕中的投影位置。
基于上述方法，激光投影设备可以确定出待显示的投影图像中每个顶点在第一图像坐标系的校正位置，并可以将待显示的投影图像的多个顶点的校正位置传输至激光投影设备。激光投影设备可以根据待显示的投影图像中每个顶点在第一图像坐标系的校正位置，对待显示的投影图像进行校正处理，从而得到校正处理后的待显示的投影图像。
在一具体实施中，对于待显示的投影图像中的每个顶点，激光投影设备可以将该顶点以及位于顶点的初始位置与校正位置之间的像素点均移动至该顶点的校正位置处，由此实现对待显示的投影图像的校正处理。
在本公开实施例中，该目标特征图形的目标投影位置、初始投影位置以及投影屏幕的多个顶点的位置均可以是指在投影屏幕的屏幕坐标系中的位置。该待显示的投影图像中顶点的校正位置和初始位置是指在待显示的投影图像的第一图像坐标系中的位置。每个特征图形在拍摄图像中的位置是指在拍摄图像的第二图像坐标系中的位置。
其中，该屏幕坐标系的原点为投影屏幕的中心点，该屏幕坐标系的横轴平行于该投影屏幕的像素行方向，该屏幕坐标系的纵轴平行于该投影屏幕的像素列方向。该第一图像坐标系的原点为待显示的投影图像的中心点，该第一图像坐标系的横轴平行与该待显示的投影图像的像素行方向，该第一图像坐标系的纵轴平行与该待显示的投影图像的像素列方向。该第二图像坐标系的原点为拍摄图像的中心点，该第二图像坐标系的横轴平行与该拍摄图像的像素行方向，该第二图像坐标系的纵轴平行与该拍摄图像的像素列方向。
在一具体实施中，目标特征图形的目标投影位置可以包括横坐标和纵坐标，目标特征图形的初始投影位置可以包括横坐标和纵坐标。投影屏幕的边框的目标顶点的位置可以包括横坐标和纵坐标。实际相对位置可以包括：第一绝对值和第二绝对值。该第一绝对值为第一差值的绝对值，第一差值为边框的目标顶点的位置的横坐标的数值与目标投影位置的横坐标的数值的差值，第二绝对值为第二差值的绝对值，第二差值为边框的目标顶点的位置的纵坐标的数值与目标投影位置的纵坐标的数值的差值。
初始相对位置可以包括：第三绝对值和第四绝对值，该第三绝对值为第三差值的绝对值，该第三差值为边框的目标顶点的位置的横坐标的数值与初始投影位置的横坐标的数值的差值。第四绝对值为第四数值的绝对值，第四数值为边框的目标顶点的位置的纵坐标的数值与初始投影位置的纵坐标的数值差值。
上述目标偏移量的偏移数值可以包括第一目标偏移值和第二目标偏移值，第一目标偏移值为第三绝对值与第一绝对值的差值的绝对值，第二目标偏移值为第四绝对值与第二绝对值的差值的绝对值。目标偏移量的偏移方向可以包括第一方向和第二方向，该第一方向为平行于像素行方向，且远离屏幕坐标系的中心点的方向。第二方向为平行于像素列方向，且远离屏幕坐标系的中心点的方向。像素偏移量的偏移数值可以包括第一像素偏移值和第二像素偏移值。
下文以投影屏幕的边框的目标顶点为右上顶点为例进行说明，若第三绝对值小于第一 绝对值，则激光投影设备可以确定第一投影图像的右上顶点的目标投影位置相对于其初始投影位置，沿第一方向偏移了第一目标偏移值。若第二投影图像中的右上顶点在第一图像坐标系的初始位置的横坐标大于0，则激光投影设备可以确定第二投影图像中的右上顶点的校正位置的横坐标为该第二投影图像中的右上顶点在第一图像坐标系的初始位置的横坐标与第一像素偏移值的差值。若第二投影图像中的右上顶点在第一图像坐标系的初始位置的横坐标小于0，则激光投影设备可以确定第二投影图像中的右上顶点的校正位置的横坐标为该第二投影图像中的右上顶点在第一图像坐标系的初始位置的横坐标与第一像素偏移值之和。
若第三绝对值大于第一绝对值，则激光投影设备可以确定第一投影图像的右上顶点的目标投影位置相对于其初始投影位置，沿与第一方向相反的方向偏移了第一目标偏移值。若第二投影图像中的右上顶点在第一图像坐标系的初始位置的横坐标大于0，则激光投影设备可以确定第二投影图像中的右上顶点的校正位置的横坐标为该第二投影图像中的右上顶点在第一图像坐标系的初始位置的横坐标与第一像素偏移值之和。若第二投影图像中的右上顶点在第一图像坐标系的初始位置的横坐标小于0，则激光投影设备可以确定第二投影图像中的右上顶点的校正位置的横坐标为该第二投影图像中的右上顶点在第一图像坐标系的初始位置的横坐标与第一像素偏移值的差值。
若第四绝对值小于第二绝对值，则激光投影设备可以确定第一投影图像的右上顶点的目标投影位置相对于其初始投影位置，沿第二方向偏移了第二目标偏移值。激光投影设备可以采用上述方法确定右上顶点的校正位置。
若第四绝对值大于第二绝对值，则激光投影设备可以确定第一投影图像的右上顶点的目标投影位置相对于其初始投影位置，沿与第二方向相反的方向偏移了第二目标偏移值。激光投影设备可以采用上述方法确定右上顶点的校正位置。
基于上述方法，激光投影设备可以确定出待显示的投影图像的左上顶点、左下顶点、右上顶点和右下顶点在第一图像坐标系的校正位置。
示例的，假设待显示的投影图像的右上顶点的初始位置大于校正位置，则激光投影设备可以将待显示的投影图像的右上顶点以及位于该右上顶点的初始位置与校正位置之间的像素点均调整至该校正位置处。由此实现对该待显示的投影图像的校正处理，即缩小该待显示的投影图像，进而实现将待显示的投影图像显示在投影屏幕的边框内。
在本公开实施例另一种在一具体实施中实现方式中，若投影屏幕的平整度较差，则激光投影设备中预先存储的投影图像(即校正图像)为棋盘格图像。若激光投影设备投射至投影屏幕的图像发生形变，和/或图像超出投影屏幕，则在进行图像校正过程中，激光投影设备可以将该投影图像投射至投影屏幕。
例如，该投影图像可以为图5所示的投影图像00。该投影图像中的多个特征图形与待显示的投影图像的多个像素区域一一对应，该像素区域可以包括阵列排布的多个像素。相应的，校正参数可以包括待显示的投影图像中多个像素区域在第一图像坐标系的校正位置。
其中，投影图像中第i行第j的特征图形与待显示的投影图像中第i行第j列的像素区域对应，该每个特征图形用于确定对应的一个像素区域的校正位置。其中，i为小于或等于投影图像包括的特征图形的行数的正整数，j为小于或等于投影图像包括的特征图形的列数的正整数。
激光投影设备在接收到拍摄设备发送的拍摄图像之后，对于每个特征图形，激光投影 设备可以确定该特征图形在投影屏幕上的目标投影位置，并可以根据该目标投影位置和初始投影位置确定该特征图形的实际偏移量。进而激光投影设备可以根据该特征图形的实际偏移量，确定待显示的投影图像中与该特征图形对应的像素区域在第一图像坐标系的像素偏移量。并可以根据该像素区域的像素偏移量确定该像素区域的校正位置。可以理解的是，该像素偏移量可以为包括偏移方向和偏移数值大小的矢量。
基于上述方法，激光投影设备可以得到待显示的投影图像中每个像素区域的校正位置。进而激光投影设备可以将待显示的投影图像中每个像素区域中像素由该像素区域在第一图像坐标系的初始位置校正至该像素区域在第一图像坐标系的校正位置处，得到校正处理后的待显示的投影图像，由此实现对该待显示的投影图像的校正处理，确保显示至形变的投影屏幕上的投影图像不会发生形变，和/或投影图像不会超出投影屏幕内，从而确保投影图像的显示效果较好。
基于上述方法，激光投影设备可以得到待显示的投影图像中每个像素区域的校正位置。进而激光投影设备可以将待显示的投影图像中每个像素区域中像素由该像素区域在第一图像坐标系的初始位置校正至该像素区域在第一图像坐标系的校正位置处，得到校正处理后的待显示的投影图像，由此实现对该待显示的投影图像的校正处理，确保显示至形变的投影屏幕上的投影图像不会发生形变，从而确保投影图像的显示效果较好。
需要说明的是，本公开实施例提供的图像校正方法步骤的先后顺序可以进行适当调整，步骤也可以根据情况进行删除。例如，步骤304可以根据情况进行删除。任何熟悉本技术领域的技术人员在本公开揭露的技术范围内，可轻易想到变化的方法，都应涵盖在本公开的保护范围之内，因此不再赘述。
综上所述，本公开实施例提供了一种图像校正方法，该方法在获取到摄像头对投影屏幕进行拍摄得到的拍摄图像后，可以将该拍摄图像发送至激光投影设备。以使得激光投影设备基于拍摄图像对待显示的投影图像进行校正，由此避免待显示的投影图像超出投影屏幕，从而确保投影图像的显示效果。
并且，拍摄设备若检测到预览画面中投影屏幕的边框位于预览画面的目标区域之外，则可以确定此时摄像头采集的拍摄图像不符合要求，因此显示调整提示信息。由此，可以使得用户及时调整摄像头的拍摄参数，确保摄像头采集的拍摄图像中投影屏幕的尺寸符合要求，从而确保采集的拍摄图像的可靠性，进而提高基于该拍摄图像对待显示的投影图像进行校正的可靠性。
图10是本公开实施例提供了一种拍摄设备的结构示意图，该拍摄设备10包括摄像头101，该拍摄设备10用于：
显示摄像头采集的预览画面，预览画面中包含投影屏幕，投影屏幕中显示有投影图像。
若检测到预览画面中投影屏幕的边框位于预览画面的目标区域之外，则显示调整提示信息，调整提示信息用于提示调整摄像头的拍摄参数。
响应于拍摄操作，获取摄像头采集的拍摄图像。
将拍摄图像发送至激光投影设备，拍摄图像用于供激光投影设备基于拍摄图像对待显示的投影图像进行校正。
综上所述，本公开实施例提供了一种拍摄设备，该拍摄设备在获取到摄像头对投影屏幕进行拍摄得到的拍摄图像后，可以将该拍摄图像发送至激光投影设备。以使得激光投影 设备基于拍摄图像校正待显示的投影图像，由此避免待显示的投影图像超出投影屏幕，从而确保投影图像的显示效果。
并且，拍摄设备若检测到预览画面中投影屏幕的边框位于预览画面的目标区域之外，则可以确定此时摄像头采集的拍摄图像不符合要求，因此显示调整提示信息。由此，可以使得用户及时调整摄像头的拍摄参数，确保摄像头采集的拍摄图像中投影屏幕的尺寸符合要求，从而确保采集的拍摄图像的可靠性，进而提高基于该拍摄图像对待显示的投影图像进行校正的可靠性。
在一具体实施中，调整提示信息还用于提示投影屏幕的边框位于预览画面的目标区域之外。
在一具体实施中，拍摄设备10还用于：
若预览画面中存在投影屏幕的边框和投影图像，则检测预览画面中投影屏幕的边框的位置。
在一具体实施中，拍摄设备10还用于：
在响应于拍摄操作，获取摄像头采集的拍摄图像之前，若检测到投影屏幕的边框位于目标区域内，则显示拍摄提示信息，拍摄提示信息用于提示对投影屏幕进行拍摄。
在一具体实施中，拍摄设备10还用于：
在预览画面中的目标位置处显示拍摄提示框，调整提示信息还用于提示将投影屏幕的边框移动至拍摄提示框限定的目标区域内。
在一具体实施中，目标区域为所述预览画面中除拍摄提示框围成的区域之外的区域；
或者，拍摄提示框包括第一提示框和围绕第一提示框的第二提示框，目标区域为第一提示框和第二提示框之间的区域。
综上所述，本公开实施例提供了一种拍摄设备，该拍摄设备在获取到摄像头对投影屏幕进行拍摄得到的拍摄图像后，可以将该拍摄图像发送至激光投影设备。以使得激光投影设备基于拍摄图像校正待显示的投影图像，由此避免待显示的投影图像超出投影屏幕，从而确保投影图像的显示效果。
并且，拍摄设备若检测到预览画面中投影屏幕的边框位于预览画面的目标区域之外，则可以确定此时摄像头采集的拍摄图像不符合要求，因此显示调整提示信息。由此，可以使得用户及时调整摄像头的拍摄参数，确保摄像头采集的拍摄图像中投影屏幕的尺寸符合要求，从而确保采集的拍摄图像的可靠性，进而提高基于该拍摄图像对待显示的投影图像进行校正的可靠性。
图11是本公开实施例提供的一种激光投影设备的结构示意图。如图11所示，该激光投影设备20可以包括参数确定电路2001、图像处理电路3001、显示控制电路3002、光阀400和投影镜头500。该参数确定电路2001集成在主板200的控制芯片2002中。在一具体实施中，该控制芯片2002可以为系统级芯片(system on chip，SOC)。
该参数确定电路2001与图像处理电路3001连接，参数确定电路2001用于基于拍摄图像确定校正参数，并将该校正参数传输至图像处理电路3001。
在本公开实施例中，在投影屏幕上显示投影图像之后，拍摄设备可以对该投影屏幕和投影图像进行拍摄，得到拍摄图像，并可以将该拍摄图像发送至激光投影设备中的参数确定电路2001。参数确定电路2001可以基于该拍摄图像确定校正参数。
若该投影图像可以包括阵列排布的多个特征图形，该多个特征图形的颜色均相同，且每个特征图形的颜色与投影图像的背景色不同，例如，该投影图像可以为图4所示的投影图像00。则校正参数可以包括待显示的投影图像中多个顶点的校正位置。
若投影图像可以为棋盘格图形，例如，该投影图像可以为图5所示的投影图像00，则该校正参数可以包括待显示的投影图像中多个像素区域的校正位置。
图像处理电路3001与显示控制电路3002连接，该图像处理电路3001用于基于校正参数对待显示的投影图像进行校正处理，以及将校正处理后的待显示的投影图像传输至显示控制电路3002。
显示控制电路3002用于基于校正处理后的待显示的投影图像生成光阀控制信号，基于光阀控制信号控制光阀400将照射至其表面的光束调制成影像光束，以及基于光阀控制信号控制光阀400将该影像光束投射至投影镜头500。
投影镜头500用于将影像光束传输至投影屏幕，以校正该校正处理后的待显示的投影图像在投影屏幕的投影位置。
显示控制电路3002在接收到图像处理电路3001传输的校正处理后的待显示的投影图像之后，可以基于该校正处理后的待显示的投影图像的像素值生成光阀400控制信号，并可以基于该光阀控制信号控制光阀400。该光阀400在该光阀控制信号的控制下，将照射至其表面的光束调制成影像光束，并将该影像光束传输至投影镜头500。该投影镜头500可以将光阀400传输的影像光束投射至投影屏幕，从而实现校正该校正处理后的待显示的投影图像的投影位置，由此实现校正待显示的投影图像在投影屏幕的投影位置。
综上所述，本公开实施例提供了一种激光投影设备，由于图像处理电路可以基于参数确定电路确定的校正参数对待显示的投影图像进行校正处理，进而使得显示控制电路将该校正处理后的待显示的投影图像投影至投影屏幕上，从而实现对该待显示的投影图像的校正，避免投影图像超出投影屏幕之外，或者显示在投影屏幕的投影图像出现形变，确保了投影图像的显示效果。
并且，由于参数确定电路集成在主板的控制芯片上，因此有效简化了激光投影设备的内部结构，提高了激光投影设备的集成度。
参考图12，激光投影设备可以包括显示板300，该显示板300可以包括数字光处理(digital light processing，DLP)芯片3003，该图像处理电路3001可以集成在DLP芯片3003中。
在本公开实施例一种在一具体实施中实现方式中，该参数确定电路2001与图像处理电路3001可以基于通用串行总线(universal serial bus，USB)协议连接。在一具体实施中，该USB协议可以为USB2.0协议，该USB2.0协议的传输速率可以达到60兆比特/秒(MB/s)。即参数确定电路2001每秒可以向图像传输电路传输60MB的校正参数。
由于该参数确定电路2001与图像处理电路3001可以通过USB协议连接，因此参数确定电路2001一次性可以向图像处理电路3001传输较多的数据(例如可以传输待显示的投影图像中多个像素区域的校正位置)，提高了校正参数传输的效率，从而提高了对投影图像校正的效率。
参考图13，该激光投影设备还可以包括位于主板200上的USB接口电路2003、开关电路2004和开关控制电路2005。在一具体实施中，该USB接口电路2003可以为USB集线器(hub)，该开关电路可以为usb开关(switch)电路。
该USB接口电路2003分别与参数确定电路2001和开关电路2004的第一端连接，该开关电路2004的第二端与图像处理电路3001连接，该开关电路2004的控制端与开关控制电路2005连接。
在一具体实施中，该USB接口电路2003分别与参数确定电路2001和开关电路2004的第一端基于USB协议连接，该开关电路2004的第二端与图像处理电路3001基于USB协议连接。
其中，该参数确定电路2001用于将校正参数传输至USB接口电路2003，该USB接口电路2003用于将校正参数传输至开关电路2004。该开关电路2004用于响应于开关控制电路2005发送的开关信号控制第一端和第二端导通，并将校正参数传输至图像处理电路3001。
参考图14，激光投影设备还可以包括位于主板200上的控制电路2006，该控制电路2006分别与参数确定电路2001、开关控制电路2005和USB接口电路2003连接。该参数确定电路2001在确定校正参数之后，可以将校正参数传输至控制电路2006。该控制电路2006在接收到该校正参数后，可以向该开关控制电路2005发送开关信号。进而该开关控制电路2005可以响应于该开关信号控制开关电路2004的第一端和第二端导通，由此在USB接口电路2003将校正参数发送至开关电路2004之后，该开关电路2004可以将该校正参数发送至图像处理电路3001。
参考图14，该激光投影设备还可以包括位于主板200上的连接器2007，该连接器2007分别与开关电路2004的第二端和图像处理电路3001基于USB协议连接。该开关电路2004用于将校正参数通过该连接器传输至图像处理电路3001。
参考图14，该激光投影设备还可以包括位于主板上的第一接口2008，该第一接口2008的一端与开关电路2004的第三端连接，该第一接口2008的另一端用于连接外部设备。
控制电路2006还用于在检测到外部设备与第一接口2008的连接指令后，向开关控制电路2005传输控制信号。该开关控制电路2005还用于响应于控制信号控制开关电路2004的第三端和第二端导通。第一接口2008用于将外部设备传输的数据传输至开关电路2004。该开关电路2004用于响应于开关控制电路2005发送的开关信号控制第三端和第二端导通，进而实现将外部设备传输的数据传输至图像处理电路3001。
在本公开实施例中，通过增加该开关电路2004，参数确定电路2001可以通过该开关电路2004向图像处理电路传输数据量较大的校正参数，由此提高了校正参数传输的效率。
在本公开实施例另一种在一具体实施中实现方式中，该参数确定电路2001和图像处理电路3001基于I2C协议连接。采用该I2C协议，该参数确定电路2001可以向图像处理电路3001传输较少的数据量(例如可以传输待显示的投影图像中多个顶点的校正位置)。
参考图15和图16，激光投影设备还可以包括位于显示板300上的主控电路3004，该主控电路3004分别与参数确定电路2001和图像处理电路3001基于I2C协议连接。该参数确定电路2001用于将校正参数通过主控电路3004传输至图像处理电路3001。在一具体实施中，该主控电路3004可以为微控制单元(micro controller unit，MCU)。
该参数确定电路2001可以将该校正参数传输至主控电路3004，进而该主控电路3004可以将该校正参数传输至图像处理电路3001。
参考图16，该激光投影设备还可以包括位于显示板300上的目标接口电路3005，该目标接口电路3005的一端与连接器2007连接，该目标接口电路3005的另一端分别与主 控电路3004和图像处理电路3001连接。该目标接口电路3005用于将第一接口传输的数据分别传输至主控电路3004和图像处理电路3001。在一具体实施中，该目标接口电路3005可以为USB hub。
参考图14和图16，该激光投影设备还可以包括位于主板200上的第二接口2009和第三接口2010，该第二接口2009的一端与USB接口电路2003连接，另一端用于连接外部设备。该第二接口2009用于将外部设备传输的数据传输至控制电路2006。该第三接口2010的一端与USB接口电路2003连接，另一端用于连接外部设备。该第三接口2010用于将外部设备传输的数据传输至控制电路2006。
参考图14和图16，该激光投影设备还可以包括位于主板200上的第四接口2011、第五接口2012和第六接口2013。该第四接口2011的一端与控制电路2006连接，另一端用于与外部设备建立通信连接，例如，该通信连接可以为WIFI连接。示例的，控制电路2006可以通过该第四接口2011与拍摄设备建立WIFI连接，并可以接收拍摄设备发送的网络数据。例如该网络数据可以为拍摄图像，控制电路2006进而可以将该拍摄图像发送至参数确定电路2001。
该第五接口2012的一端与控制电路2006连接，该第五接口2012用于接收语音数据，并将接收到的语音数据传输至控制电路2006。
该第六接口2013的一端与控制电路2006连接，该第六接口2013的另一端与投影屏幕上的摄像头建立通信连接，并可以接收摄像头采集的视频图像。
参考图14和图16，该控制电路2006还与第一存储器2014连接，该控制电路2006用于接收该第一存储器2014传输的存储数据。该激光投影设备还可以包括第二存储器2015，该第二存储器2015与显示控制电路3002连接，该显示控制电路3002用于将投影图像中像素的像素值存储至第二存储器2015中。
综上所述，本公开实施例提供了一种激光投影设备，由于图像处理电路可以基于参数确定电路确定的校正参数对待显示的投影图像进行校正处理，进而使得显示控制电路将该校正处理后的待显示的投影图像投影至投影屏幕上，从而实现对该待显示的投影图像进行校正，避免投影图像超出投影屏幕之外，或者显示在投影屏幕的投影图像出现形变，确保了投影图像的显示效果。
并且，由于参数确定电路集成在主板的控制芯片上，因此有效简化了激光投影设备的内部结构，提高了激光投影设备的集成度。
本公开实施例提供了一种拍摄设备，包括：存储器，处理器及存储在该存储器上的计算机程序，该处理器执行该计算机程序时实现上述方法实施例(例如图2或图3任一所示的实施例)。
本公开实施例提供了一种计算机可读存储介质，该计算机可读存储介质中存储有指令，该指令由处理器加载并执行以实现如上述方法实施例(例如图2或图3任一所示的实施例)。
本公开实施例提供了一种包含指令的计算机程序产品，当计算机程序产品在计算机上运行时，使得该计算机执行如上述方法实施例(例如图2或图3任一所示的实施例)。
在本公开实施例中，术语“第一”、“第二”、“第三”、“第四”、第五”和“第六”仅 用于描述目的，而不能理解为指示或暗示相对重要性。本公开实施例中术语“多个”的含义是指两个或两个以上。本公开实施例中的“和/或”仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。
以上所述仅为本公开的可选实施例，并不用以限制本公开，凡在本公开的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本公开的保护范围之内。

Claims (10)

  1. 一种图像校正方法，其特征在于，应用于拍摄设备，所述拍摄设备包括摄像头，所述方法包括：
    显示所述摄像头采集的预览画面，所述预览画面中包含投影屏幕的边框和投影图像；
    若检测到所述预览画面中所述投影屏幕的边框位于所述预览画面的目标区域之外，则显示调整提示信息，所述调整提示信息用于提示调整所述摄像头的拍摄参数；
    响应于拍摄操作，获取所述摄像头采集的拍摄图像；
    将所述拍摄图像发送至激光投影设备，所述拍摄图像用于供所述激光投影设备基于所述拍摄图像对待显示的投影图像进行校正。
  2. 根据权利要求1所述的方法，其特征在于，所述拍摄参数包括：所述摄像头与所述投影屏幕之间的距离，和/或，所述摄像头的焦距。
  3. 根据权利要求1所述的方法，其特征在于，所述调整提示信息还用于提示所述投影屏幕的边框位于所述预览画面的目标区域之外。
  4. 根据权利要求1至3任一所述的方法，其特征在于，所述方法还包括：
    若所述预览画面中存在所述投影屏幕的边框和所述投影图像，则检测所述预览画面中所述投影屏幕的边框的位置。
  5. 根据权利要求1至3任一所述的方法，其特征在于，在所述响应于拍摄操作，获取所述摄像头采集的拍摄图像之前，所述方法还包括：
    若检测到所述投影屏幕的边框位于所述目标区域内，则显示拍摄提示信息，所述拍摄提示信息用于提示对所述投影屏幕进行拍摄。
  6. 根据权利要求1至3任一所述的方法，其特征在于，所述方法还包括：
    在所述预览画面中的目标位置处显示拍摄提示框，所述调整提示信息还用于提示将所述投影屏幕的边框移动至所述拍摄提示框限定的所述目标区域内。
  7. 根据权利要求6所述的方法，其特征在于，所述目标区域为所述预览画面中除所述拍摄提示框围成的区域之外的区域；
    或者，所述拍摄提示框包括第一提示框和围绕所述第一提示框的第二提示框，所述目标区域为所述第一提示框和所述第二提示框之间的区域。
  8. 一种拍摄设备，其特征在于，所述拍摄设备包括摄像头，所述拍摄设备用于：
    显示所述摄像头采集的预览画面，所述预览画面中包含投影屏幕的边框和投影图像；
    若检测到所述预览画面中所述投影屏幕的边框位于所述预览画面的目标区域之外，则显示调整提示信息，所述调整提示信息用于提示调整所述摄像头的拍摄参数；
    响应于拍摄操作，获取所述摄像头采集的拍摄图像；
    将所述拍摄图像发送至激光投影设备，所述拍摄图像用于供所述激光投影设备基于所述拍摄图像对待显示的投影图像进行校正。
  9. 根据权利要求8所述的拍摄设备，其特征在于，所述拍摄参数包括：所述摄像头与所述投影屏幕之间的距离，和/或，所述摄像头的焦距。
  10. 根据权利要求8或9所述的拍摄设备，其特征在于，所述调整提示信息还用于提示所述投影屏幕的边框位于所述预览画面的目标区域之外。
PCT/CN2022/082298 2021-05-25 2022-03-22 图像校正方法及拍摄设备 WO2022247418A1 (zh)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202280037929.4A CN117378196A (zh) 2021-05-25 2022-03-22 图像校正方法及拍摄设备
US18/467,613 US20240007741A1 (en) 2021-05-25 2023-09-14 Method and system for correcting image

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202110571992.3 2021-05-25
CN202110571992.3A CN113286134A (zh) 2021-05-25 2021-05-25 图像校正方法及拍摄设备

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US18/467,613 Continuation-In-Part US20240007741A1 (en) 2021-05-25 2023-09-14 Method and system for correcting image

Publications (1)

Publication Number Publication Date
WO2022247418A1 true WO2022247418A1 (zh) 2022-12-01

Family

ID=77281450

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2022/082298 WO2022247418A1 (zh) 2021-05-25 2022-03-22 图像校正方法及拍摄设备

Country Status (3)

Country Link
US (1) US20240007741A1 (zh)
CN (2) CN113286134A (zh)
WO (1) WO2022247418A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024164633A1 (zh) * 2023-02-07 2024-08-15 北京石头创新科技有限公司 投影图像修正方法、装置、投影设备、采集设备及介质

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113286134A (zh) * 2021-05-25 2021-08-20 青岛海信激光显示股份有限公司 图像校正方法及拍摄设备
WO2023071256A1 (zh) * 2021-10-29 2023-05-04 青岛海信激光显示股份有限公司 激光投影设备及投影图像的校正方法
CN114268777B (zh) * 2021-12-20 2023-08-18 青岛海信激光显示股份有限公司 激光投影设备的开机方法及激光投影系统
CN114466173A (zh) * 2021-11-16 2022-05-10 海信视像科技股份有限公司 投影设备及自动投入幕布区域的投影显示控制方法
CN114245089B (zh) * 2021-12-20 2023-07-18 青岛海信激光显示股份有限公司 几何校正方法、装置、激光投影设备
CN114584751B (zh) * 2022-03-30 2024-08-16 青岛海信激光显示股份有限公司 投影图像的校正方法和激光投影设备
CN114710652A (zh) * 2022-04-19 2022-07-05 江苏镭创高科光电科技有限公司 一种投影画面调整方法及装置
CN115297309B (zh) * 2022-07-29 2024-05-10 青岛海信激光显示股份有限公司 投影画面显示方法及投影设备

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107509066A (zh) * 2016-06-14 2017-12-22 中兴通讯股份有限公司 一种调整投影图像的方法及投影仪
CN207117843U (zh) * 2017-08-21 2018-03-16 深圳大学 一种便携式投影校正系统及设备
CN108337494A (zh) * 2018-05-18 2018-07-27 歌尔科技有限公司 一种投影设备的校准方法、装置、投影设备及终端设备
CN109005394A (zh) * 2018-09-19 2018-12-14 青岛海信激光显示股份有限公司 一种投影图像的校正方法及投影机
US20200366877A1 (en) * 2019-05-13 2020-11-19 Coretronic Corporation Projection system, projection apparatus and calibrating method for displayed image thereof
CN113286135A (zh) * 2021-05-25 2021-08-20 青岛海信激光显示股份有限公司 图像校正方法及设备
CN113286134A (zh) * 2021-05-25 2021-08-20 青岛海信激光显示股份有限公司 图像校正方法及拍摄设备

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107509066A (zh) * 2016-06-14 2017-12-22 中兴通讯股份有限公司 一种调整投影图像的方法及投影仪
CN207117843U (zh) * 2017-08-21 2018-03-16 深圳大学 一种便携式投影校正系统及设备
CN108337494A (zh) * 2018-05-18 2018-07-27 歌尔科技有限公司 一种投影设备的校准方法、装置、投影设备及终端设备
CN109005394A (zh) * 2018-09-19 2018-12-14 青岛海信激光显示股份有限公司 一种投影图像的校正方法及投影机
US20200366877A1 (en) * 2019-05-13 2020-11-19 Coretronic Corporation Projection system, projection apparatus and calibrating method for displayed image thereof
CN113286135A (zh) * 2021-05-25 2021-08-20 青岛海信激光显示股份有限公司 图像校正方法及设备
CN113286134A (zh) * 2021-05-25 2021-08-20 青岛海信激光显示股份有限公司 图像校正方法及拍摄设备

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024164633A1 (zh) * 2023-02-07 2024-08-15 北京石头创新科技有限公司 投影图像修正方法、装置、投影设备、采集设备及介质

Also Published As

Publication number Publication date
US20240007741A1 (en) 2024-01-04
CN117378196A (zh) 2024-01-09
CN113286134A (zh) 2021-08-20

Similar Documents

Publication Publication Date Title
WO2022247418A1 (zh) 图像校正方法及拍摄设备
WO2022206527A1 (zh) 投影图像的校正方法及激光投影设备
WO2022179109A1 (zh) 投影校正方法、装置、存储介质和电子设备
JP3844076B2 (ja) 画像処理システム、プロジェクタ、プログラム、情報記憶媒体および画像処理方法
WO2022247419A1 (zh) 激光投影设备及图像校正系统
TWI719493B (zh) 投影系統、投影裝置以及其顯示影像的校正方法
JP4495041B2 (ja) ピンホール投影により表示面上のレーザポイントと関連付けられるプロジェクタ画素を求める方法
KR100622164B1 (ko) 화상 처리 시스템, 프로젝터, 휴대형 장치 및 화상 처리방법
KR101428064B1 (ko) 화면 왜곡 보정 장치 및 방법
CN113259644B (zh) 激光投影系统及图像校正方法
CN113286135A (zh) 图像校正方法及设备
TWI703869B (zh) 投影裝置、投影系統及影像校正方法
WO2017179111A1 (ja) 表示システムおよび情報処理方法
CN114900675A (zh) 激光投影设备及投影图像的校正方法
CN114339179A (zh) 投影校正方法、装置、存储介质以及投影设备
JP6439254B2 (ja) 画像投影装置、画像投影装置の制御方法、および画像投影装置の制御プログラム
TWI678926B (zh) 投影方法及投影系統
CN114979599B (zh) 激光投影设备及投影图像的校正方法
TWI745992B (zh) 用於虛擬觸控之投影裝置及其方法
WO2020162051A1 (ja) 投射型映像表示システム
JP2021175166A (ja) 投影システム、投影方法、プログラム
TWM599940U (zh) 用於虛擬觸控之投影裝置
US20230254463A1 (en) Focal length calculation method, display method performed by projector, and imaging system
WO2024080234A1 (ja) 投影装置、補正装置、投影システム、補正方法及びコンピュータプログラム
TWI695625B (zh) 畫面校正方法及投影機系統

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 22810152

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 202280037929.4

Country of ref document: CN

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 22810152

Country of ref document: EP

Kind code of ref document: A1